condition	mean	min	max
4 h after light	6.29806	6.05866	6.436640000000001
8 h after light	6.768386666666667	6.45202	6.934710000000001
12 h after light	7.00739	6.4749300000000005	7.34505
4 h after dark	6.2716199999999995	5.98727	6.41913
8 h after dark	6.21864	6.16786	6.30558
12 h after dark	6.30445	6.10174	6.4465699999999995